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Particle production and effective thermalization in inhomogeneous mean field theory

Gert Aarts Orcid Logo, Jan Smit

Physical Review D, Volume: "D61", Issue: 2, Start page: 025002

Swansea University Author: Gert Aarts Orcid Logo

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DOI (Published version): 10.1103/PhysRevD.61.025002

Abstract

As a toy model for dynamics in nonequilibrium quantum field theory we consider the abelian Higgs model in 1+1 dimensions with fermions. In the approximate dynamical equations, inhomogeneous classical (mean) Bose fields are coupled to quantized fermion fields, which are treated with a mode function e...

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Published in: Physical Review D
ISSN: 0556-2821 1089-4918
Published: 1999
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URI: https://cronfa.swan.ac.uk/Record/cronfa22621
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first_indexed 2015-07-21T11:25:51Z
last_indexed 2018-02-09T05:00:58Z
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spelling 2015-07-21T11:29:13.8298016 v2 22621 2015-07-21 Particle production and effective thermalization in inhomogeneous mean field theory 1ba0dad382dfe18348ec32fc65f3f3de 0000-0002-6038-3782 Gert Aarts Gert Aarts true false 2015-07-21 SPH As a toy model for dynamics in nonequilibrium quantum field theory we consider the abelian Higgs model in 1+1 dimensions with fermions. In the approximate dynamical equations, inhomogeneous classical (mean) Bose fields are coupled to quantized fermion fields, which are treated with a mode function expansion. The effective equations of motion imply e.g. Coulomb scattering, due to the inhomogeneous gauge field. The equations are solved numerically. We define time dependent fermion particle numbers with the help of the single-time Wigner function and study particle production starting from inhomogeneous initial conditions. The particle numbers are compared with the Fermi-Dirac distribution parametrized by a time dependent temperature and chemical potential. We find that the fermions approximately thermalize locally in time. Journal Article Physical Review D "D61" 2 025002 0556-2821 1089-4918 30 6 1999 1999-06-30 10.1103/PhysRevD.61.025002 http://inspirehep.net/record/502697 @articleAarts:1999zn, author = "Aarts, Gert and Smit, Jan", title = "Particle production and effective thermalization in inhomogeneous mean field theory", journal = "Phys.Rev.", volume = "D61", pages = "025002", doi = "10.1103/PhysRevD.61.025002", year = "2000", eprint = "hep-ph/9906538", archivePrefix = "arXiv", primaryClass = "hep-ph", reportNumber = "THU-99-16, ITFA-99-16", SLACcitation = "%%CITATION = HEP-PH/9906538;%%", COLLEGE NANME Physics COLLEGE CODE SPH Swansea University 2015-07-21T11:29:13.8298016 2015-07-21T10:15:14.2212810 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics Gert Aarts 0000-0002-6038-3782 1 Jan Smit 2
title Particle production and effective thermalization in inhomogeneous mean field theory
spellingShingle Particle production and effective thermalization in inhomogeneous mean field theory
Gert Aarts
title_short Particle production and effective thermalization in inhomogeneous mean field theory
title_full Particle production and effective thermalization in inhomogeneous mean field theory
title_fullStr Particle production and effective thermalization in inhomogeneous mean field theory
title_full_unstemmed Particle production and effective thermalization in inhomogeneous mean field theory
title_sort Particle production and effective thermalization in inhomogeneous mean field theory
author_id_str_mv 1ba0dad382dfe18348ec32fc65f3f3de
author_id_fullname_str_mv 1ba0dad382dfe18348ec32fc65f3f3de_***_Gert Aarts
author Gert Aarts
author2 Gert Aarts
Jan Smit
format Journal article
container_title Physical Review D
container_volume "D61"
container_issue 2
container_start_page 025002
publishDate 1999
institution Swansea University
issn 0556-2821
1089-4918
doi_str_mv 10.1103/PhysRevD.61.025002
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Physics{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Physics
url http://inspirehep.net/record/502697
document_store_str 0
active_str 0
description As a toy model for dynamics in nonequilibrium quantum field theory we consider the abelian Higgs model in 1+1 dimensions with fermions. In the approximate dynamical equations, inhomogeneous classical (mean) Bose fields are coupled to quantized fermion fields, which are treated with a mode function expansion. The effective equations of motion imply e.g. Coulomb scattering, due to the inhomogeneous gauge field. The equations are solved numerically. We define time dependent fermion particle numbers with the help of the single-time Wigner function and study particle production starting from inhomogeneous initial conditions. The particle numbers are compared with the Fermi-Dirac distribution parametrized by a time dependent temperature and chemical potential. We find that the fermions approximately thermalize locally in time.
published_date 1999-06-30T03:26:47Z
_version_ 1763750977710587904
score 11.035634

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